From 2eee3f4ca45181460d22846acc70a8fb23ed0cdc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
Date: Tue, 3 May 2022 13:37:31 +0300
Subject: [PATCH] audioconvert: If no channel-mask can be fixated then use a
 NONE channel layout

Otherwise this is generating caps without a channel-mask, which is
invalid for >1 channels and will always fail negotiation.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2350>
---
 subprojects/gst-plugins-base/gst/audioconvert/gstaudioconvert.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/subprojects/gst-plugins-base/gst/audioconvert/gstaudioconvert.c b/subprojects/gst-plugins-base/gst/audioconvert/gstaudioconvert.c
index 48f15bf5e9..24bfe9ef10 100644
--- a/subprojects/gst-plugins-base/gst/audioconvert/gstaudioconvert.c
+++ b/subprojects/gst-plugins-base/gst/audioconvert/gstaudioconvert.c
@@ -697,6 +697,8 @@ gst_audio_convert_fixate_channels (GstBaseTransform * base, GstStructure * ins,
   } else if (out_chans > 1) {
     GST_ERROR_OBJECT (base, "Have no default layout for %d channels",
         out_chans);
+    gst_structure_set (outs, "channel-mask", GST_TYPE_BITMASK,
+        G_GUINT64_CONSTANT (0), NULL);
   }
 }